Presentation 2005/11/10
Some Characteristics of AgPd40wt% Contacts in DC42V-6A or DC42V-4.2A Resistive Circuit(Automotive Application)
Ryo YAMAZAKI, Tomoya ITO, Junpei WATANABE, Junya SEKIKAWA, Takayoshi KUBONO,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) AgPd40wt% contacts mounted on relays were tested in DC42V-6A or DC42V-4.2A resistive circuit as make-only contacts and break-only contacts. In this experiment, we took photographs of the contacts from and measured number of bounce Bc, arc durations Dc, and contact resistance Rc. In all samples used as make-only contacts, minute granular asperity area was formed each on the cathode and on the anode, and no remarkable pip was formed on contact surface. There was a tendency on make-only contacts that Dc gradually reduced and Rc remained constant as number of operations Op increased. Sticking didn't occur. In samples used as break-only contacts, the areas of colors and shapes on contacts surface, Bc, Dc, and Rc were different by the difference of the current value. We consider the results are caused by that Dc on break-only contacts extended greatly for samples in DC42V-6A resistive circuit compared with samples in DC42V-4.2A resistive circuit. We suspect the reason as follows : there might be a boundary that the metallic phase arc shifted to the gas phase arc when the current was within range of 4.2-6A for AgPd40wt% break-only contacts in DC42V resistive circuit.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) AgPd40wt% contacts / electrical contacts / make-only contacts / break-only contacts / contact surface / arc duration
Paper # EMD2005-77
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Committee EMD
Conference Date 2005/11/10(1days)
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Registration To Electromechanical Devices (EMD)
Language ENG
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Some Characteristics of AgPd40wt% Contacts in DC42V-6A or DC42V-4.2A Resistive Circuit(Automotive Application)
Sub Title (in English)
Keyword(1) AgPd40wt% contacts
Keyword(2) electrical contacts
Keyword(3) make-only contacts
Keyword(4) break-only contacts
Keyword(5) contact surface
Keyword(6) arc duration
1st Author's Name Ryo YAMAZAKI
1st Author's Affiliation Graduate School of Science and Technology, Shizuoka University()
2nd Author's Name Tomoya ITO
2nd Author's Affiliation Graduate School of Science and Technology, Shizuoka University
3rd Author's Name Junpei WATANABE
3rd Author's Affiliation Graduate School of Science and Technology, Shizuoka University
4th Author's Name Junya SEKIKAWA
4th Author's Affiliation Faculty of Engineering, Shizuoka University
5th Author's Name Takayoshi KUBONO
5th Author's Affiliation Faculty of Engineering, Shizuoka University
Date 2005/11/10
Paper # EMD2005-77
Volume (vol) vol.105
Number (no) 412
Page pp.pp.-
#Pages 6
Date of Issue